Registers – Coded record sensors – Testing
Reexamination Certificate
2006-02-01
2008-10-07
Lee, Seung H (Department: 2887)
Registers
Coded record sensors
Testing
C235S451000, C235S454000
Reexamination Certificate
active
07431210
ABSTRACT:
An image forming apparatus includes: an image processing section for performing tone correction of an image signal; and an image output section for outputting an image in accordance with an image recording signal output, wherein the image processing section includes: a tone correction processing unit which, in accordance with an input image signal, outputs the image signal having undergone tone correction; a density calculation unit for calculating a density value at a given position in a scanning direction of a test pattern image in accordance with an image signal pertaining to the input test pattern image; and a discrimination unit for discriminating whether or not density inconsistencies having arisen at the given position in the scanning direction can be corrected by the tone correction processing unit, on the basis of the density value calculated by the density calculation unit and a predetermined threshold value.
REFERENCES:
patent: 5629990 (1997-05-01), Tsuji et al.
patent: 5995248 (1999-11-01), Katori et al.
patent: 11004346 (1999-01-01), None
patent: A 11-177824 (1999-07-01), None
Kikuchi Michio
Kubo Masahiko
Ogatsu Hitoshi
Sugi Shinsuke
Takebe Yoshifumi
Fuji 'Xerox Co., Ltd.
Lee Seung H
OIiff & Berridge, PLC
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